smartcontract

package
v0.0.0-...-cbe201a Latest Latest
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 Go to latest Published: Aug 6, 2019 License: MIT Imports: 13 Imported by: 0

Documentation

Index

Constants

View Source 
const (
	Uint160Length = 20
)

Variables

View Source 
var NativeAssets = map[string]NativeAsset{
	"c56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b": NEO,
	"602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7": GAS,
}

Functions

func ReadBigInt 

func ReadBigInt(reader *bufio.Reader) (value big.Int, e error)

func ReadHexString 

func ReadHexString(reader *bufio.Reader) string

func RoundFixed8 

func RoundFixed8(val float64) (newVal float64)

Types

type Balance 

type Balance struct {
	Amount float64
	UTXOs  []UTXO
}

func (*Balance) SortMinFirst 

func (b *Balance) SortMinFirst()

func (*Balance) TotalAmount 

func (b *Balance) TotalAmount() float64

type NEOAddress 

type NEOAddress []byte

func NEOAddressFromScriptHash 

func NEOAddressFromScriptHash(scriptHashBytes []byte) NEOAddress

func ParseNEOAddress 

func ParseNEOAddress(address string) NEOAddress

func ReadNEOAddress 

func ReadNEOAddress(reader *bufio.Reader) (*NEOAddress, error)

func (NEOAddress) ToString 

func (n NEOAddress) ToString() string

type NativeAsset 

type NativeAsset string
const (
	NEO NativeAsset = "c56f33fc6ecfcd0c225c4ab356fee59390af8560be0e930faebe74a6daff7c9b"
	GAS NativeAsset = "602c79718b16e442de58778e148d0b1084e3b2dffd5de6b7b16cee7969282de7"
)

func (NativeAsset) ToLittleEndianBytes 

func (n NativeAsset) ToLittleEndianBytes() []byte

type NetworkFeeAmount 

type NetworkFeeAmount float64

type OpCode 

type OpCode byte
const (
	// Constants
	PUSH0       OpCode = 0x00 // An empty array of bytes is pushed onto the stack.
	PUSHF       OpCode = PUSH0
	PUSHBYTES1  OpCode = 0x01 // 0x01-0x4B The next opcode bytes is data to be pushed onto the stack
	PUSHBYTES75 OpCode = 0x4B
	PUSHDATA1   OpCode = 0x4C // The next byte contains the number of bytes to be pushed onto the stack.
	PUSHDATA2   OpCode = 0x4D // The next two bytes contain the number of bytes to be pushed onto the stack.
	PUSHDATA4   OpCode = 0x4E // The next four bytes contain the number of bytes to be pushed onto the stack.
	PUSHM1      OpCode = 0x4F // The number -1 is pushed onto the stack.
	PUSH1       OpCode = 0x51 // The number 1 is pushed onto the stack.
	PUSHT       OpCode = PUSH1
	PUSH2       OpCode = 0x52 // The number 2 is pushed onto the stack.
	PUSH3       OpCode = 0x53 // The number 3 is pushed onto the stack.
	PUSH4       OpCode = 0x54 // The number 4 is pushed onto the stack.
	PUSH5       OpCode = 0x55 // The number 5 is pushed onto the stack.
	PUSH6       OpCode = 0x56 // The number 6 is pushed onto the stack.
	PUSH7       OpCode = 0x57 // The number 7 is pushed onto the stack.
	PUSH8       OpCode = 0x58 // The number 8 is pushed onto the stack.
	PUSH9       OpCode = 0x59 // The number 9 is pushed onto the stack.
	PUSH10      OpCode = 0x5A // The number 10 is pushed onto the stack.
	PUSH11      OpCode = 0x5B // The number 11 is pushed onto the stack.
	PUSH12      OpCode = 0x5C // The number 12 is pushed onto the stack.
	PUSH13      OpCode = 0x5D // The number 13 is pushed onto the stack.
	PUSH14      OpCode = 0x5E // The number 14 is pushed onto the stack.
	PUSH15      OpCode = 0x5F // The number 15 is pushed onto the stack.
	PUSH16      OpCode = 0x60 // The number 16 is pushed onto the stack.

	// Flow control
	NOP      OpCode = 0x61 // Does nothing.
	JMP      OpCode = 0x62
	JMPIF    OpCode = 0x63
	JMPIFNOT OpCode = 0x64
	CALL     OpCode = 0x65
	RET      OpCode = 0x66
	APPCALL  OpCode = 0x67
	SYSCALL  OpCode = 0x68
	TAILCALL OpCode = 0x69

	// Stack
	DUPFROMALTSTACK OpCode = 0x6A
	TOALTSTACK      OpCode = 0x6B // Puts the input onto the top of the alt stack. Removes it from the main stack.
	FROMALTSTACK    OpCode = 0x6C // Puts the input onto the top of the main stack. Removes it from the alt stack.
	XDROP           OpCode = 0x6D
	XSWAP           OpCode = 0x72
	XTUCK           OpCode = 0x73
	DEPTH           OpCode = 0x74 // Puts the number of stack items onto the stack.
	DROP            OpCode = 0x75 // Removes the top stack item.
	DUP             OpCode = 0x76 // Duplicates the top stack item.
	NIP             OpCode = 0x77 // Removes the second-to-top stack item.
	OVER            OpCode = 0x78 // Copies the second-to-top stack item to the top.
	PICK            OpCode = 0x79 // The item n back in the stack is copied to the top.
	ROLL            OpCode = 0x7A // The item n back in the stack is moved to the top.
	ROT             OpCode = 0x7B // The top three items on the stack are rotated to the left.
	SWAP            OpCode = 0x7C // The top two items on the stack are swapped.
	TUCK            OpCode = 0x7D // The item at the top of the stack is copied and inserted before the second-to-top item.

	// Splice
	CAT    OpCode = 0x7E // Concatenates two strings.
	SUBSTR OpCode = 0x7F // Returns a section of a string.
	LEFT   OpCode = 0x80 // Keeps only characters left of the specified point in a string.
	RIGHT  OpCode = 0x81 // Keeps only characters right of the specified point in a string.
	SIZE   OpCode = 0x82 // Returns the length of the input string.

	// Bitwise logic
	INVERT OpCode = 0x83 // Flips all of the bits in the input.
	AND    OpCode = 0x84 // Boolean and between each bit in the inputs.
	OR     OpCode = 0x85 // Boolean or between each bit in the inputs.
	XOR    OpCode = 0x86 // Boolean exclusive or between each bit in the inputs.
	EQUAL  OpCode = 0x87 // Returns 1 if the inputs are exactly equal 0 otherwise.

	// Arithmetic
	// Note: Arithmetic inputs are limited to signed 32-bit integers but may overflow their output.
	INC         OpCode = 0x8B // 1 is added to the input.
	DEC         OpCode = 0x8C // 1 is subtracted from the input.
	SIGN        OpCode = 0x8D
	NEGATE      OpCode = 0x8F // The sign of the input is flipped.
	ABS         OpCode = 0x90 // The input is made positive.
	NOT         OpCode = 0x91 // If the input is 0 or 1 it is flipped. Otherwise the output will be 0.
	NZ          OpCode = 0x92 // Returns 0 if the input is 0. 1 otherwise.
	ADD         OpCode = 0x93 // a is added to b.
	SUB         OpCode = 0x94 // b is subtracted from a.
	MUL         OpCode = 0x95 // a is multiplied by b.
	DIV         OpCode = 0x96 // a is divided by b.
	MOD         OpCode = 0x97 // Returns the remainder after dividing a by b.
	SHL         OpCode = 0x98 // Shifts a left b bits preserving sign.
	SHR         OpCode = 0x99 // Shifts a right b bits preserving sign.
	BOOLAND     OpCode = 0x9A // If both a and b are not 0 the output is 1. Otherwise 0.
	BOOLOR      OpCode = 0x9B // If a or b is not 0 the output is 1. Otherwise 0.
	NUMEQUAL    OpCode = 0x9C // Returns 1 if the numbers are equal 0 otherwise.
	NUMNOTEQUAL OpCode = 0x9E // Returns 1 if the numbers are not equal 0 otherwise.
	LT          OpCode = 0x9F // Returns 1 if a is less than b 0 otherwise.
	GT          OpCode = 0xA0 // Returns 1 if a is greater than b 0 otherwise.
	LTE         OpCode = 0xA1 // Returns 1 if a is less than or equal to b 0 otherwise.
	GTE         OpCode = 0xA2 // Returns 1 if a is greater than or equal to b 0 otherwise.
	MIN         OpCode = 0xA3 // Returns the smaller of a and b.
	MAX         OpCode = 0xA4 // Returns the larger of a and b.
	WITHIN      OpCode = 0xA5 // Returns 1 if x is within the specified range (left-inclusive) 0 otherwise.

	// Crypto
	//RIPEMD160 OpCode = 0xA6 // The input is hashed using RIPEMD-160.
	SHA1          OpCode = 0xA7 // The input is hashed using SHA-1.
	SHA256        OpCode = 0xA8 // The input is hashed using SHA-256.
	HASH160       OpCode = 0xA9
	HASH256       OpCode = 0xAA
	CHECKSIG      OpCode = 0xAC
	CHECKMULTISIG OpCode = 0xAE

	// Array
	ARRAYSIZE OpCode = 0xC0
	PACK      OpCode = 0xC1
	UNPACK    OpCode = 0xC2
	PICKITEM  OpCode = 0xC3
	SETITEM   OpCode = 0xC4
	NEWARRAY  OpCode = 0xC5 //用作引用類型
	NEWSTRUCT OpCode = 0xC6 //用作值類型
	APPEND    OpCode = 0xC8
	REVERSE   OpCode = 0xC9
	REMOVE    OpCode = 0xCA

	// Exceptions
	THROW      OpCode = 0xF0
	THROWIFNOT OpCode = 0xF1
)

type Operation 

type Operation string

type ParameterType 

type ParameterType byte
const (
	Signature ParameterType = 0x00
	Boolean   ParameterType = 0x01

	Integer ParameterType = 0x02

	Hash160 ParameterType = 0x03

	Hash256 ParameterType = 0x04

	ByteArray ParameterType = 0x05
	PublicKey ParameterType = 0x06
	String    ParameterType = 0x07

	Array            ParameterType = 0x10
	InteropInterface ParameterType = 0xf0
	Void             ParameterType = 0xff
)

func (ParameterType) Byte 

func (p ParameterType) Byte() byte

type Parser 

type Parser struct {
	Script string
}

func NewParserWithScript 

func NewParserWithScript(script string) Parser

func (*Parser) ContainsOperation 

func (p *Parser) ContainsOperation(operation string) bool

func (*Parser) ContainsScriptHash 

func (p *Parser) ContainsScriptHash(scripthash string) bool

func (*Parser) ContainsScriptHashAndOperation 

func (p *Parser) ContainsScriptHashAndOperation(scripthash string, operation string) bool

func (*Parser) FindScriptHashes 

func (p *Parser) FindScriptHashes() ([]string, error)

func (*Parser) GetListOfOperations 

func (p *Parser) GetListOfOperations() ([]string, error)

func (*Parser) GetListOfScriptHashes 

func (p *Parser) GetListOfScriptHashes() ([]string, error)

func (*Parser) Parse 

func (p *Parser) Parse(methodSignature interface{}) ([]interface{}, error)

This method return an array of given method signature because sometimes script can contains multiple app calls

type ParserInterface 

type ParserInterface interface {
	Parse(methodSignature interface{}) ([]interface{}, error)
	GetListOfOperations() ([]string, error)
	GetListOfScriptHashes() ([]string, error)
	ContainsOperation(operation string) bool
	ContainsScriptHash(scripthash string) bool
	ContainsScriptHashAndOperation(scripthash string, operation string) bool
}

type Properties 

type Properties int
const (
	NoProperty       Properties = 0
	HasStorage       Properties = 1 << 0
	HasDynamicInvoke Properties = 1 << 1
	Payable          Properties = 1 << 2
)

type ScriptBuilder 

type ScriptBuilder struct {
	RawBytes []byte
}

func (*ScriptBuilder) Clear 

func (s *ScriptBuilder) Clear()

func (*ScriptBuilder) EmptyOutput 

func (s *ScriptBuilder) EmptyOutput() []byte

func (*ScriptBuilder) EmptyTransactionAttributes 

func (s *ScriptBuilder) EmptyTransactionAttributes() []byte

func (ScriptBuilder) FullHexString 

func (s ScriptBuilder) FullHexString() string

func (*ScriptBuilder) GenerateContractInvocationData 

func (s *ScriptBuilder) GenerateContractInvocationData(scriptHash ScriptHash, operation string, args []interface{}) []byte

This is in a format of main(string operation, []object args) in c#

func (*ScriptBuilder) GenerateContractInvocationScript 

func (s *ScriptBuilder) GenerateContractInvocationScript(scriptHash ScriptHash, operation string, args []interface{}) []byte

when generate the invokescript we don't need the length of the whole script

func (*ScriptBuilder) GenerateTransactionAttributes 

func (s *ScriptBuilder) GenerateTransactionAttributes(attributes map[TransactionAttribute][]byte) ([]byte, error)

func (*ScriptBuilder) GenerateTransactionInput 

func (s *ScriptBuilder) GenerateTransactionInput(unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount) ([]byte, error)

func (*ScriptBuilder) GenerateTransactionOutput 

func (s *ScriptBuilder) GenerateTransactionOutput(sender NEOAddress, receiver NEOAddress, unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount) ([]byte, error)

func (*ScriptBuilder) GenerateTransactionOutputPayableGAS 

func (s *ScriptBuilder) GenerateTransactionOutputPayableGAS(sender NEOAddress, receiver NEOAddress, unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount, payableGAS float64) ([]byte, error)

func (*ScriptBuilder) GenerateVerificationScripts 

func (s *ScriptBuilder) GenerateVerificationScripts(scripts []interface{}) []byte

func (*ScriptBuilder) GenerateVerificationScriptsMultiSig 

func (s *ScriptBuilder) GenerateVerificationScriptsMultiSig(signatures []TransactionSignature) []byte

func (*ScriptBuilder) Push 

func (s *ScriptBuilder) Push(data interface{}) error

func (*ScriptBuilder) PushLength 

func (s *ScriptBuilder) PushLength(count int)

func (*ScriptBuilder) PushOpCode 

func (s *ScriptBuilder) PushOpCode(opcode OpCode)

func (*ScriptBuilder) PushSysCall 

func (s *ScriptBuilder) PushSysCall(command string)

func (*ScriptBuilder) PushVarData 

func (s *ScriptBuilder) PushVarData(b []byte)

func (ScriptBuilder) ToBytes 

func (s ScriptBuilder) ToBytes() []byte

func (*ScriptBuilder) ToScriptHash 

func (s *ScriptBuilder) ToScriptHash() []byte

type ScriptBuilderInterface 

type ScriptBuilderInterface interface {
	GenerateContractInvocationScript(scriptHash ScriptHash, operation string, args []interface{}) []byte
	GenerateContractInvocationData(scriptHash ScriptHash, operation string, args []interface{}) []byte
	GenerateTransactionAttributes(attributes map[TransactionAttribute][]byte) ([]byte, error)

	//this is to send the UTXO of asset that will be used in TransactionOutput
	GenerateTransactionInput(unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount) ([]byte, error)
	GenerateTransactionOutput(sender NEOAddress, receiver NEOAddress, unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount) ([]byte, error)
	GenerateTransactionOutputPayableGAS(sender NEOAddress, receiver NEOAddress, unspent Unspent, assetToSend NativeAsset, amountToSend float64, networkFeeAmount NetworkFeeAmount, payableGAS float64) ([]byte, error)
	EmptyOutput() []byte
	GenerateVerificationScripts(signatures []interface{}) []byte

	GenerateVerificationScriptsMultiSig(signatures []TransactionSignature) []byte

	EmptyTransactionAttributes() []byte
	ToBytes() []byte
	FullHexString() string
	Clear()

	//public method to wrap pushData
	Push(data interface{}) error
	PushVarData(data []byte)
	PushOpCode(opcode OpCode)
	PushSysCall(command string)

	ToScriptHash() []byte //UInt160

	PushLength(count int)
	// contains filtered or unexported methods
}

func NewScriptBuilder 

func NewScriptBuilder() ScriptBuilderInterface

type ScriptHash 

type ScriptHash []byte

func NewScriptHash 

func NewScriptHash(hexString string) (ScriptHash, error)

func (ScriptHash) ToBigEndian 

func (s ScriptHash) ToBigEndian() []byte

func (ScriptHash) ToString 

func (s ScriptHash) ToString() string

type TokenAmount 

type TokenAmount uint

type TradingVersion 

type TradingVersion byte //currently 0

const (
	NEOTradingVersion           TradingVersion = 0x00
	NEOTradingVersionPayableGAS TradingVersion = 0x01
)

type Transaction 

type Transaction struct {
	Type       TransactionType
	Version    TradingVersion
	Data       []byte
	Attributes []byte
	Inputs     []byte
	Outputs    []byte
	//scripts contains two parts, Invocation script and Verification script
	Script []byte
	GAS    uint64 //only for version 1
}

func NewContractTransaction 

func NewContractTransaction() Transaction

func NewInvocationTransaction 

func NewInvocationTransaction() Transaction

func NewInvocationTransactionPayable 

func NewInvocationTransactionPayable() Transaction

func NewTransactionWithType 

func NewTransactionWithType(txType byte, version int) Transaction

func (*Transaction) ToBytes 

func (t *Transaction) ToBytes() []byte

func (*Transaction) ToHash256 

func (t *Transaction) ToHash256() []byte

this ToHash256 returns little endian bytes. TXID is big endian bytes, so when calling json-rpc api we need to reverse it

func (*Transaction) ToTXID 

func (t *Transaction) ToTXID() string

type TransactionAttribute 

type TransactionAttribute byte
const (
	ContractHash TransactionAttribute = 0x00

	ECDH02 TransactionAttribute = 0x02

	ECDH03 TransactionAttribute = 0x03

	Script TransactionAttribute = 0x20

	Vote TransactionAttribute = 0x30

	DescriptionUrl TransactionAttribute = 0x81
	Description    TransactionAttribute = 0x90

	Hash1  TransactionAttribute = 0xa1
	Hash2  TransactionAttribute = 0xa2
	Hash3  TransactionAttribute = 0xa3
	Hash4  TransactionAttribute = 0xa4
	Hash5  TransactionAttribute = 0xa5
	Hash6  TransactionAttribute = 0xa6
	Hash7  TransactionAttribute = 0xa7
	Hash8  TransactionAttribute = 0xa8
	Hash9  TransactionAttribute = 0xa9
	Hash10 TransactionAttribute = 0xaa
	Hash11 TransactionAttribute = 0xab
	Hash12 TransactionAttribute = 0xac
	Hash13 TransactionAttribute = 0xad
	Hash14 TransactionAttribute = 0xae
	Hash15 TransactionAttribute = 0xaf

	Remark   TransactionAttribute = 0xf0
	Remark1  TransactionAttribute = 0xf1
	Remark2  TransactionAttribute = 0xf2
	Remark3  TransactionAttribute = 0xf3
	Remark4  TransactionAttribute = 0xf4
	Remark5  TransactionAttribute = 0xf5
	Remark6  TransactionAttribute = 0xf6
	Remark7  TransactionAttribute = 0xf7
	Remark8  TransactionAttribute = 0xf8
	Remark9  TransactionAttribute = 0xf9
	Remark10 TransactionAttribute = 0xfa
	Remark11 TransactionAttribute = 0xfb
	Remark12 TransactionAttribute = 0xfc
	Remark13 TransactionAttribute = 0xfd
	Remark14 TransactionAttribute = 0xfe
	Remark15 TransactionAttribute = 0xf
)

func (TransactionAttribute) ToByte 

func (t TransactionAttribute) ToByte() byte

type TransactionOutput 

type TransactionOutput struct {
	Asset   NativeAsset
	Value   int64
	Address NEOAddress
}

type TransactionSignature 

type TransactionSignature struct {
	SignedData []byte
	PublicKey  []byte
}

type TransactionType 

type TransactionType byte
const (
	MinerTransaction      TransactionType = 0x00
	IssueTransaction      TransactionType = 0x01
	ClaimTransaction      TransactionType = 0x02
	EnrollmentTransaction TransactionType = 0x20
	RegisterTransaction   TransactionType = 0x40
	ContractTransaction   TransactionType = 0x80
	StateTransaction      TransactionType = 0x90
	PublishTransaction    TransactionType = 0xd0
	InvocationTransaction TransactionType = 0xd1
)

type TransactionValidationScript 

type TransactionValidationScript struct {
	StackScript  []byte
	RedeemScript []byte
}

naming base on NEO network protocol http://docs.neo.org/en-us/network/network-protocol.html

type UTXO 

type UTXO struct {
	Index int
	TXID  string
	Value float64
}

type Unspent 

type Unspent struct {
	Assets map[NativeAsset]*Balance
}

Source Files

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